What is the process? Why was it hard before, and why does it work now?
I'm not expecting a thorough analysis, but the article was very light on what they are actually doing, even for a casual reader.
You can directly do AlOx+energy ->Al+O2. This is the proposal, and it works, somewhat.
I am not sure this needed to be in the article, as the balance between 'too basic' and 'sufficient' is tricky.
What is the process? Why was it hard before, and why does it work now?
I'm not expecting a thorough analysis, but the article was very light on what they are actually doing, even for a casual reader.